A median light streak may be present on the carapace and the light sternal band is sometimes broken. The middle of the posterior head region often has a light streak not found in grinnelli, crassipes or arizonica. (1)

The following image is closest to the ventral drawing in the work cited:

Disclaimer: Dedicated naturalists volunteer their time and resources here to provide this service. We strive to provide accurate information, but we are mostly just amateurs attempting to make sense of a diverse natural world. If you need expert professional advice, contact your local extension office.